广西师范大学学报（自然科学版） ›› 2019, Vol. 37 ›› Issue (2): 188-193.doi: 10.16088/j.issn.1001-6600.2019.02.023

• • 上一篇    

不同淋洗剂对矿区土壤重金属解吸的影响

徐婷婷1, 余秋平1, 漆培艺1, 刘可慧2,3, 李艺1,3, 蒋永荣3,4, 于方明1,3*   

  1. 1. 广西师范大学环境与资源学院,广西桂林541006;
    2. 广西师范大学生命科学学院,广西桂林541006;
    3. 岩溶生态与环境变化研究广西高校重点实验室(广西师范大学),广西桂林541004;
    4. 桂林电子科技大学生命与环境科学学院,广西桂林541004
  • 收稿日期:2018-03-13 出版日期:2019-04-25 发布日期:2019-04-28
  • 通讯作者: 于方明(1975—),男,湖南绥宁人,广西师范大学教授,博士。E-mail:fmyu1215@163.com
  • 基金资助:
    国家自然科学基金(41661077);国家重点研发计划(2017YFD0801500);广西创新驱动发展专项(桂科AA17204047-3);广西自然科学基金(2016GXNSFAA380046,2017GXNSFBA198168,2018JJA150018);桂林市科学研究与技术开发项目(201612054)

Effects of Different Washing Solutions on the Desorption of Heavy Metals from a Lead-zinc Mine Soil

XU Tingting1, YU Qiuping1, QI Peiyi1, LIU Kehui2,3, LI Yi1,3, JIANG Yongrong3,4, YU Fangming1,3*   

  1. 1.College of Environment and Resource, Guangxi Normal University, Guilin Guangxi 541006, China;
    2.College of Life Science, Guangxi Normal University, Guilin Guangxi 541006, China;
    3.Key Laboratory of Karst Ecology and Environment Change of Guangxi Department of Education (Guangxi Normal University), Guilin Guangxi 541004, China;
    4.College of Life and Environmental Science, Guilin University of Electronic Technology, Guilin Guangxi 541004, China
  • Received:2018-03-13 Online:2019-04-25 Published:2019-04-28

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摘要： 以广西柳州市融安县泗顶镇某铅锌矿区土壤为研究对象,采用振荡淋溶的方法,研究0、2.5、5、10 mmol/L乙二醇二乙醚二胺四乙酸(EGTA)、乙二胺四乙酸(EDTA)、酒石酸(TA)、抗坏血酸(VC)、草酸(OA)、柠檬酸(CA)对矿区土壤中4种重金属Cd、Pb、Mn、Zn解吸效果的影响。结果表明,EDTA、OA、EGTA、TA、CA、VC中以EDTA对Pb、Zn、Cd的淋洗效果最好,且最佳浸提时间为9 h,在第9小时时其对Pb、Zn、Cd的去除率分别为6.82%、6.72%和3.87%。VC、CA对Mn的释放效果最好,释放量均随着酸处理浓度的增加而增加;在VC、CA处理浓度为10 mmol/L时,Mn的释放量分别为对照的4.59和4.28倍;虽然VC对Mn的释放量随着处理时间的增加而增加,但在9 h后其释放量间无显著差异(P>0.05),因此最佳浸提时间也为9 h。

关键词: 有机酸, EDTA, 土壤重金属, 解吸

Abstract: The desorption of Cd, Pb, Mn and Zn from lead-zinc mine soils with six common organic acids was investigated by using soil washing approach. EGTA,citricacid (CA),oxalic acid (OA),tartaric acid (TA),ascorbic acid (VC) and EDTA at the concentration of 0,2.5,5 and 10 mmol·L-1 were studied. Heavy metal contaminated soils were collected from a lead-zinc mine area in Rong’an County,Guangxi province.The results indicated that EDTA has the greatest efficiency on releasing Pb, Zn and Cd from soils among the six organic acids,and the best extraction time is 9 h. At 9 h,the removal rates of EDTA to soil Pb,Zn and Cd were 6.82%,6.72% and 3.87%,respectively.VC and CA showed the greatest removal efficiency to soil Mn and the release efficiency was enhanced with the increase of the acid concentration. At 10 mmol·L-1 concentration of VC and CA,the amount of released soil Mn was 4.59 and 4.28 times greater than that of the control. Under the VC treatment,the amount of released soil Mn increased with the extraction time during the first 9 h washing after which there was no significant increase of Mn release(P>0.05),therefore the best extraction time was also 9 h.

Key words: organic acids, EDTA, soil heavy metals, desorption

中图分类号: 

  • X53
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